Zenith Vintage Zenith ref A6621 Keyhole Automatic Cal 2542 PC vintage 60s
Ref. no. a6621
Zenith Vintage Zenith ref A6621 Keyhole Automatic Cal 2542 PC vintage 60s
Ref. no. a6621
+ € 35 insured shipping
Available
Ready to ship in 1-3 days
100% Authentic watches
Buyer protection with ESCROW-service
Customers rate Wristler 4.8/5
Safe pick-up or delivery, Warranty & Easy returns
Real people, real service
Wrist Treasure
Average response time: 15 minutes
Description
The Zenith A6621 was introduced on the occasion of Zenith's centenary in 1965 and was produced until about 1969. The design may surprise today's watch collectors, but it was very popular back then. The bi-color dial features three silver-colored sections that appear lighter or darker depending on the viewing angle. The stainless steel case consists of a wide beveled bezel, which has a date display under a loupe at 6 o'clock. This creates the shape of a keyhole, which is why the cool nickname has become popular among vintage collectors, recently serviced…
Case:
o UFO-style stainless steel case, serial 621A101, profissional polished
o Fine condition with strong geometry
o 35mm without crown / 38mm lug to lug / 10.5mm thickness / 18mm lug width
o Plexiglass with minor scratch and marks, specifically in the magnifying glass in the date window area.
o Generic crown - Important Note regarding the Original Crown: The watch has recently undergone a full mechanical service and is currently fitted with a functional replacement crown for daily operation. The highly sought-after original Zenith star-signed crown is included in the sale as an uninstalled spare part. During the service, it was noted that a fragment of the previous stem remains lodged inside the original crown's thread. To strictly preserve the integrity of this rare original part and avoid any risk of cosmetic or structural damage through aggressive extraction methods, the watchmaker opted to leave it untouched. It is delivered alongside the watch, allowing the future owner to decide whether to undergo specialized micro-extraction (such as an alum bath solution) to reuse it.
Movement:
o Mechanical Automatic cal. Cal 2542 PC - serviced by watchmaker in May 2026
(movement was disassembled, washed, lubricated) - photo of timegrapher
Dial:
o flawless two-tone dial - date window under a magnifying glass at 6 o'clock - signed "SWISS MADE
Bracelet Material:
o New 18mm in dark blue leather, with generic steel buckle
Conclusion:
This Zenith 'Keyhole' A6621 is a masterclass in 1970s Swiss watch design, combining a robust manufacture movement with an unmistakable retro-futuristic aesthetic. Ready to wear and accurate after its recent overhaul, it represents a fantastic opportunity for serious Zenith collectors to acquire an authentic piece of space-age horological history.
please see photos as they are part of the description.
No box or papers, no water proof test, sold as is, any question feel free for ask...
Keep in mind that it is a vintage watch, it is normal to be 1/2 minute early or late
wrist-treasure
Information
Caliber
Case
Bracelet
Payment methods
Wire transfer
iDeal | Wero
Bancontact
EPS
Przelewy24
Credit Card *
* Depending on seller’s preferences
Other
Zenith Vintage Zenith ref A6621 Keyhole Automatic Cal 2542 PC vintage 60s
Ref. no. a6621
+ € 35 insured shipping
Available
Ready to ship in 1-3 days
100% Authentic watches
Buyer protection with ESCROW-service
Customers rate Wristler 4.9/5
Safe pick-up or delivery, warranty & easy returns
Real people, real service
Wrist Treasure
Average response time: 15 minutes
Buy with confidence
More eye catchers
Let’s find that watch you like
Ref. no. a6621
Zenith Vintage
Zenith ref A6621 Keyhole Automatic Cal 2542 PC vintage 60s
Copy the link below to click one of the platforms below.
- New / unworn
- The watch has not been worn and is in new condition. It may come directly from an authorised dealer or the brand itself, or it may have been recently traded without being worn.
- Pre-owned
- The watch has previously been traded and may show light to visible signs of wear, depending on the stated condition.
The condition is determined by the seller based on visual inspection and functional assessment in accordance with Wristler guidelines.
- New
- Sourced directly from an authorised dealer or the brand. Unpolished and free from signs of wear. Delivered with full manufacturer’s warranty. The warranty period begins upon registration with the brand and may have already started prior to delivery to the final buyer.
- Unworn
- Previously traded but never worn. May qualify as New Old Stock (NOS). Free from visible signs of wear. Does not imply anything about remaining manufacturer’s warranty or the presence of factory stickers.
- Very good
- Minor signs of wear such as hairline marks or small surface scratches. Case, bezel, and bracelet retain sharp edges and overall form. May have been professionally polished without affecting the original contours. Fully functional mechanically.
- Good
- Visible signs of wear such as scratches, small dents, or light bracelet stretch. May have been professionally polished. Fully functional mechanically.
- Fair
- Clearly visible signs of wear, including scratches, dents, or noticeable bracelet or clasp wear. Servicing may be recommended in the future. Fully functional unless otherwise stated.
All watches offered on Wristler are fully functional and meet normal expectations for mechanical performance unless explicitly stated otherwise. The seller provides a guarantee on proper mechanical operation.
Water resistance cannot be guaranteed for older watches unless specifically indicated.
If you have any doubts about the condition, carefully review the photos and description. You may contact the seller via chat to request additional photos or video material to better assess the watch before purchase.
- Manufacturer's warranty
- The manufacturer offers a 2-year international warranty from the warranty activation date. This date can differ from the year of production, so the remaining warranty depends on this specific watch; see its papers.
Product
- Article type
- Watch
- Brand
- Zenith
- Reference no.
- a6621
Manufacturer
Zenith Branch of LVMH Manufactures S.A.34 rue des Billodes
Le Locle
Switzerland
- customer.service1@zenith-watches.com
EU responsible
LVMH Watch & Jewelry Central Europe GmbHZimmersmühlenweg 8-10
61440 Oberursel
Germany
- customer.service1@zenith-watches.com